Auxiliary lever attachment for jacks



s. P. BARKER.

AUXILIARY LEVER ATTACHMENT FOR JACKS. APPLICATION FILED DEC. 24, I919.

1,362,4 2., Patented Dec.14 ,1920.

1 I ta I l A TTOH/VE rs PATENT OFFlCE.

SYDNEY PER-CY BARKER, OF 'NEW YORK, N. Y.

AUXILIARY LEVER ATTACHMENT FOR JACKS.

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Application filed December 24, 1919.

To all whom it may concern:

Be it known that I, SYDNEY P. BARKER, a citizen of the United States, and a resident of the city of New York borough of Manhattan, in the county and State of New York, have invented a new and Improved Auxiliary Lever Attachment for Jacks, of which the following is a full clear, and exact description.

This invention relates to hoisting apparatus and has particular reference to lifting jacks designed especially for being applied beneath the rear axle of an automobile or other place that is ordinarily more or less inaccessible for the positioning and manipulation of a lifting jack by means of a short lever.

The available space for the introduction of a lifting jack beneath the rear axle of a usual high powered automobile is so limited not only as to make it difficult to introduce the jack, but especially it is practically impossible for the usual. short lever cooperating therewith to have sufficient room to give a lift of even one notch.

One of the objects of the invention therefore is to provide a lever of sufficient length for use for introducing the jack under such conditions as above mentioned and having connections with the usual lever socket so designed as to give suflicient lift to the jack even though the longer lever be given an oscillation through a relatively small angle.

Another object of the invention is to provide a novel form of jointed lever adapting it for use as a long lever and to be folded into small length for packing in the tool box or the like.

With the foregoing and other objects in view the invention consists in the arrangement and combination of parts hereinafter described and claimed. and while the invention is not restricted to the exact details of construction disclosed or suggested here- 1 in, still for the purpose of illustrating a practical. embodiment thereof reference is had to the accompanying drawings, in which like reference characters designate the same parts in the several views, and in which- Figure 1 is a side elevation of a lifting jack having my improvement attached thereto.

Fig. 2 is a'horizontal section on the line 2-2 of Fig. 1.

Fig. 3 is a vertical transverse section on the line 3-3 of Fig. 1.

Specification of Letters Patent.

Patented Dec. 14, 1920.

Serial No. 347,098.

Fig. 4 is a detail perspective view of the ointed lever in partially folded position.

Referring now more specifically to the drawings I show a lifting jack having a standard 10 extending upward from the base 11. At the upper end of the standard is a. head 12 which is slidable within a casing 13 having any suitable lifting and holding means including a socket member 14 for the usual short lever (not shown). This socket member is pivoted at 15 in the casing 13 for oscillation around a horizontal axis.

Thedotted lines in Fig. 1 indicate that the socket member 14 is required to move through an arc of considerable size in order to effect the lifting of the head, but if there is an overhanging chassis or other obstruction such as an oil tank or luggage carrier it is practically impossible for the rear axle of an automobile to be hoisted with the application of a lever to this socket. Furthermore it is a diiiicult expedient, because of the high position of the socket member with respect to the base, for the short lever applied to said socket holder to be relied upon for shoving the jack beneath the axle. the tendency being for the jack to tilt forward over the base.

In order to overcome the above mentioned objects I employ anauxiliary lever socket 16 having a yoke 17 spanning the lower portion of the standard 10 and pivoted around an axis 18 to said standard. A clamp 19 may be employed for facilitating the attachment of the socket member 16 to the standard. The pivots 18 are shown as extending through the ends of the yoke and through the side portions of the clamp and also through the side members of the standard. The socket member 16 has an end socket 20 for the reception of a lever 21 which may be of any suitable length, but preferably of sutiicient length to reach well to the rear of the machine when the jack is in place beneath the axle.

As shown herein the lever 21 comprises at least three sections a, b and c pivoted together by pivots 22 and each rearwardly projecting section having a lip 23 just ahead of the pivot 22 to engage against the under edge of the nextforward section to make a rigid joint in the downward thrust of the lever. There is sufficient friction at the joints 22 to insure the required amount of lifting of the lever in the idle movement thereof.

' member 16 and is pivoted thereto by Any suitable rigid but adjustable means may be provided to operatively connect the socket members 14 and 16 so that the actuation of the latter will cause an actuation of the former. T 0 this end I provide a link 24 comprising upper and lower yokes 25 and 26 rigidly but adjustably connected as to length by'means of a double ended bolt 27 having right and left threaded engagement with correspondingly threaded hubs 25 and 26 of said yokes respectively. The upper yoke straddles and is pivotally connected to a clamp 28 gripped around the socket mem ber 14 at any desired distance from the pivot 15 thereof, the connection between the yoke 25 and the clamp being through axial pivots 29. The yoke 26 straddles the socket means of coaxial pivots 30.

It will be observed that since the lever connection 16 is approximately double in length that of the socket member 14 and the outer ends of the socket members are linked together, for simultaneous movement around their respective pivots, a sweep of the member 16 in an arc of a circle around its aXis will cause a considerably greater angular movement of the socket member 14. The latter socket member having the usual operative connection with the lifting jack head, (which not being my invention is not specifically shown) it follows that with the downward thrust upon the lever applied to the auxiliary attachment 16 the socket member 14 Wlll be actuated far enough to cause an effective movemenet of the lifting means.

The ratio of sweep or angular movement between the two socket members 14 and 16 may be varied by the adjustment of the clamp 28 toward or from the axis 15 and while the power is applied in this manner to what may be regarded as a, short arm lever at 14 it is still to be noted that the the two socket members 14 and 16 which may be considered permanent. The adjustment of the link 24 through the double ended bolt 27 serves to establish a proper correlation between the positions of the members 14 and 16 with respect to the ratchet mechanism of the jack and according to the adjustment of the clamp 28 along the member 14.

I claim:

1. The combination with a lifting jack having actuating means including a short lever socket member adapted for use with a short lever, of an auxiliary lever socket pivoted to the jack below the short lever socket, a lever interchangeably connectible with either socket member, a rigid link extending between the socket members, means to pivotally connect said link to the respective socket members at different distances from their pivots, and means to vary the effective length of said link. 7

2. The combination with a lifting jack having actuating means including a short lever socket member pivoted thereto around a horizontal axis, of an auxiliary socket member pivoted to the jack below the first mentioned socket member, a rigid link extending between the socket members, and means to pivotally connect the link to the respective socket members, said pivoting means including a clamp adjustable lengtha wise along one of the socket members to thereby vary the ratio of lengths of the respective socket members.

3. The combination with a lifting jack having a vertical standard and'actuating means including a short lever socket member pivoted to swing around a horizontal axis, of an auxiliary lever attachment com-V prising a socket member, means to pivot the latter socket member to the standard comprising a clamp embracing the standard, a rigid member extending between the socket members and pivotally connected to the outer surfaces of both of them, and a lever selectively applicable to either socket member independently of said rigid member 7 connections.

SYDNEY PERCY BARKER. 

